How to Use Runway With AI Cost Shock
Reverse-engineers cash on hand from current runway × current burn, replaces the AI line with a shocked figure, and computes new runway plus break-even revenue and months-to-break-even at compound growth.
What It Does
Use the calculator with intent
Reverse-engineers cash on hand from current runway × current burn, replaces the AI line with a shocked figure, and computes new runway plus break-even revenue and months-to-break-even at compound growth.
Founders and CFOs planning for vendor risk, especially after recent LLM provider price moves.
Interpreting Results
If new runway is below 12 months and break-even is more than 18 months out, you need a hedge — multi-vendor, prompt caching, or a cheaper model tier.
Input Steps
Field by field
- 1
Months
Months of runway today, used to back out cash.
- 2
Current
Current LLM-vendor line item.
- 3
Total
Total monthly burn including AI cost. Validated to be ≥ AI cost.
- 4
Percent
Percent increase to model. Use 50% as a base case, 100% as a stress case.
Negative values let you stress-test a price drop too.
- 5
Compound
Compound monthly growth used to compute months-to-break-even.
Common Scenarios
Use realistic starting points
Modest 25% shock
AI price shock
25
Runway barely shifts when AI is < 10% of burn.
Doomsday 100%
AI price shock
100
If AI is 30%+ of burn, runway shortens by months.
Try These Tools
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Startup Runway Calculator
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Monthly Burn Rate Calculator
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LLM Vendor Lock-In Cost
Engineering, downtime, and payback when migrating between LLM providers.
FAQ
Questions people ask next
The short answers readers usually want after the first pass.
Sources & References
- Carta — State of Private Markets 2024 — Carta
- SaaS Capital Annual Survey 2024 — SaaS Capital
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